Update README.md
Merge pull request #5 from pvogel1967/production

Production changes to respond more quickly when local node pushes data to remote, proper use of global to make io.sockets available for broadcast at the routes/api level
Add a reasonable home page with (at the moment) static nav to contests and a brief discussion of the system as well as a download link for the Excel scoring app.
Add a reasonable home page with (at the moment) static nav to contests and a brief discussion of the system as well as a download link for the Excel scoring app.
Merge pull request #6 from pvogel1967/master

Add home page and installer